Finding source of TUR signals

I have a fibre fabric and SAN with 8 servers (7 Dell PE 2650, 1 Dell PE
6650, XIOTech Magnitude 3D 3000e SAN, 2-McData 4400 fibre switches, a Dell
PV-136T (ADIC Scalar 100) Tape Library), 4 of which are setup in two
2-physical node Active/Active clusters with two virtual servernames on each
cluster. The backup system is CommVault 6.1 w/SP3. One server is Win2KAS,
the rest are Server 2003 Enterprise SP1 or R2.

SOMETHING in this system is generating TUR signals, and, eventually taking
the Library and/or drives offline (after 2-3 weeks).

I've followed the recommendations in KB 842411 in disabling the Removable
Storage service on all servers, and putting AutoRun=0 in any ControlSet
services that even smell like tape-related or library-related.

But...something's still generating the TUR signal (based on the Library's
logs), unfortunately, it doesn't tell me from what server.

Any way to find out WHERE or what service this is coming from? Can I
monitor each server for this signal, or something?

Thanks

Re: Finding source of TUR signals

Did you find a fix for this problem? We are having a similar problem
currently, again with ComVault.

We have 2 Microsoft 2003 R2 clusters (1 x 2 node Active/Active cluster
and 1 x 3 node Active/Active/Passive cluster) and 1 server dedicated to
running the ComVault software and is also is dedicated to handling all
media change operations in the library. All servers are HP DL380 with
QLogic dual port fibre cards. The cluster nodes also have Hitachi's
HDLM software installed to manage path failover to the HDS storage
(AMS500)

The tape library is a Spectra Logic T50 (2 drive LTO3, SAN connected).
Every thing is connected to Brocade 220E switches.

Backups operate fine - sometimes. Media change operations work fine
initially. Then afer usually a couple of tape moves the software will
report a media changer error and mark the tape as bad. The problem
always occurs while trying to mount a tape.
The errors we are getting in CommVault are:

There is then a coresponding error on the library about a SCSI Robotics
error, at this stage even moving a tape to the drive using the library
front panel would fail. We would then have to power cycle the library
and it will work fine.

We have now had 3 replacement libraries from Spectra, along with
firmware upgrades etc. We have also applied KB842411 (disabling AutoRun
etc) - but to no avail.

The Unknown Media Changer on all the cluster nodes has also been
disabled, so that only the main backup server can control the library
(as is setup in the backup software) - therefore hopefully stoping
Windows even trying to access the media changer.

We are now getting to the stage where we are looking at other
manufacturers for the tape library (HP MSL4048 for example)

Any thoughts/help would be appreciated.

Bill Bradley wrote:
> I have a fibre fabric and SAN with 8 servers (7 Dell PE 2650, 1 Dell PE
> 6650, XIOTech Magnitude 3D 3000e SAN, 2-McData 4400 fibre switches, a Dell
> PV-136T (ADIC Scalar 100) Tape Library), 4 of which are setup in two
> 2-physical node Active/Active clusters with two virtual servernames on each
> cluster. The backup system is CommVault 6.1 w/SP3. One server is Win2KAS,
> the rest are Server 2003 Enterprise SP1 or R2.
>
> SOMETHING in this system is generating TUR signals, and, eventually taking
> the Library and/or drives offline (after 2-3 weeks).
>
> I've followed the recommendations in KB 842411 in disabling the Removable
> Storage service on all servers, and putting AutoRun=0 in any ControlSet
> services that even smell like tape-related or library-related.
>
> But...something's still generating the TUR signal (based on the Library's
> logs), unfortunately, it doesn't tell me from what server.
>
> Any way to find out WHERE or what service this is coming from? Can I
> monitor each server for this signal, or something?
>
> Thanks